Online self-design and self-adjustment of stabilizers

The stabilizers, which include the power system stabilizers (PSSs) and DC/AC converter based stabilizers, are widely used in the power system to suppress the power oscillations. This paper establishes a method for the online self-design or self-adjustment of the stabilizers in multi-machine power systems. The application of the proposed method is directly focused on the tie-line power variation measured by Phasor Measurement Unit (PMU) in real time. If there is no stabilizer installed yet, self-design procedure is activated, otherwise there comes to self-adjustment procedure. Once a low-frequency oscillation is detected, the parameters of the stabilizers can be online designed or adjusted according to the current operating status of the power system in order to supply enough damping.